| A | B |
|---|
| Magnesium + oxygen | magnesium oxide |
| Sodium + chlorine | sodium chloride |
| Carbon + oxygen | carbon dioxide |
| Potassium + bromine | potassium bromide |
| Magnesium + chlorine | magnesium chloride |
| Lithium + oxygen | lithium oxide |
| Magnesium + copper sulphate | magnesium sulphate + copper |
| Potassium + zinc chloride | potassium chloride + zinc |
| hydrogen + oxygen | water |
| nitrogen + hydrogen | ammonia |
| hydrochloric acid + sodium hydroxide | sodium chloride + water |
| nitric acid + potassium hydroxide | potassium nitrate + water |
| sodium carbonate + hydrochloric acid | sodium chloride + carbon dioxide + water |
| calcium carbonate + sulphuric acid | calcium sulphate + water + carbon dioxide |
| sulphuric acid + potassium hydroxide | potassium sulphate + water |
| sodium + water | sodium hydroxide + hydrogen |
| hydrochloric acid + magnesium | magnesium chloride + hydrogen |
| Calcium + water | calcium hydroxide + hydrogen |
| methane + oxygen | carbon dioxide + water |
| carbon dioxide + water | glucose + oxygen |
